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The following seems to be a mistake in Gelfand-Manin 96:
on p. 335 they claim that the ground field is the terminal object in dgc-algebras.
That would be true for augmented algebras, which is however not what they are discussing at this point. The terminal object is the zero-algebra. And maybe they misled themselves by the way they are defining unital algebras on p. 333.
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